b736a23bc3
ha_partition::handle_unordered_scan_next_partition is called in a variety of accesses, including index_read, index_prev, and index_next. ha_partition::handle_unordered_next and ha_partition::handle_unordered_prev are called from index_next and index_prev accesses. They check for signs of end of scan (m_part_spec.start_part == NO_CURRENT_PART_ID) and exit early if that is the case. HA_ERR_END_OF_FILE (EOF) is commonly paired with assigning NO_CURRENT_PART_ID to m_part_spec.start_part whenever possible, to signal the end of scan. The error HA_ERR_KEY_NOT_FOUND means the requested key is not found. It should not mean the end of scan, when for example ha_partition::handle_unordered_scan_next_partition is called from index_read, because a subsequent index_next[_same] / index_prev call would then incorrectly return immediately from ha_partition::handle_unordered_next / ha_partition::handle_unordered_prev. This is why HA_ERR_KEY_NOT_FOUND is retained and returned in ha_partition::handle_unordered_scan_next_partition. But if the call is from index_next[_same] / index_prev, HA_ERR_KEY_NOT_FOUND should indeed mean end of scan. In this patch, we ensure this is the case by converting HA_ERR_KEY_NOT_FOUND to EOF in ha_partition::handle_unordered_next / ha_partition::handle_unordered_prev.
Code status:
ci.appveyor.com
MariaDB: The innovative open source database
MariaDB was designed as a drop-in replacement for MySQL(R) with more features, new storage engines, fewer bugs, and better performance.
MariaDB is brought to you by the MariaDB Foundation and the MariaDB Corporation. Please read the CREDITS file for details about the MariaDB Foundation, and who is developing MariaDB.
MariaDB is developed by many of the original developers of MySQL who now work for the MariaDB Corporation, the MariaDB Foundation and by many people in the community.
MySQL, which is the base of MariaDB, is a product and trademark of Oracle Corporation, Inc. For a list of developers and other contributors, see the Credits appendix. You can also run 'SHOW authors' to get a list of active contributors.
A description of the MariaDB project and a manual can be found at:
https://mariadb.com/docs/release-notes
Getting the code, building it and testing it
Refer to the following guide: https://mariadb.org/get-involved/getting-started-for-developers/get-code-build-test/ which outlines how to build the source code correctly and run the MariaDB testing framework, as well as which branch to target for your contributions.
Help
More help is available from the Maria Discuss mailing list https://lists.mariadb.org/postorius/lists/discuss.lists.mariadb.org/ and MariaDB's Zulip instance, https://mariadb.zulipchat.com/
Licensing
MariaDB is specifically available only under version 2 of the GNU General Public License (GPLv2). (I.e. Without the "any later version" clause.) This is inherited from MySQL. Please see the README file in the MySQL distribution for more information.
License information can be found in the COPYING file. Third party license information can be found in the THIRDPARTY file.
Bug Reports
Bug and/or error reports regarding MariaDB should be submitted at: https://jira.mariadb.org
For reporting security vulnerabilities, see our security-policy.
The code for MariaDB, including all revision history, can be found at: https://github.com/MariaDB/server